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Fenton-reaction-based improved industrial organic wastewater treatment method

A technology of organic wastewater treatment and Fenton reaction, applied in the direction of light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of large dosage, unsuitable for large-scale use, and difficult recovery of catalysts

Inactive Publication Date: 2015-12-23
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of the Fenton reaction is that the H 2 o 2 The decomposition speed is fast and the oxidation rate is high; technical disadvantages: Fe 2+ Dosage is too large, H 2 o 2 Utilization is not high, resulting in H 2 o 2 Dosage increases, not suitable for large-scale use
Although a lot of research has been devoted to improving the H 2 o 2 However, there is still a problem that cannot be ignored, that is, metal ions will eventually enter the water body, which is not only difficult to recycle the catalyst, but also causes secondary pollution

Method used

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  • Fenton-reaction-based improved industrial organic wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 50 ml of production wastewater from a citrus processing company, and the COD of the wastewater is 8427mg / L. Add 0.078g / L magnetic iron ferric oxide nanocrystal (size is 10-20nm, as figure 1 , figure 2 Shown) solution, after fully mixing, add 5 milliliters of hydrogen peroxide with a volume concentration of 30%, and irradiate with a 500-watt ultraviolet lamp for 10 hours. After the reaction, the catalyst was separated by a magnet, and the COD of the waste water was measured (results are shown in Table 1).

[0028] The magnetic ferric iron tetroxide recovered after the reaction was tested repeatedly, and the results are shown in Table 2

Embodiment 2

[0030] Take 50 ml of wastewater from a surfactant production company, and the COD of the wastewater is 113832 mg / L. Add 0.217g / L magnetic iron ferric oxide nanocrystal (size is 10-20nm, as figure 1 , figure 2 Shown) solution, after thorough mixing, add 4 milliliters of 30% hydrogen peroxide, 500 watts of ultraviolet light irradiation 8h. Add 4 milliliters of 30% hydrogen peroxide again for the second time, and continue to illuminate for 8 hours. After the reaction, the catalyst was separated by a magnet, and the COD of the waste water was measured (results are shown in Table 1).

Embodiment 3

[0032] Take 50 ml of production wastewater from an organic reagent production company, and the COD of the wastewater is 20000mg / L. Add 0.15g / L magnetic iron ferric oxide nanocrystals (size is 10-20nm, such as figure 1 , figure 2 Shown) solution, add 4 milliliters of 30% hydrogen peroxide after thorough mixing, 500 watts of ultraviolet lamps irradiate 7h. For the second time, 4 ml of 30% hydrogen peroxide was added again, and light was continued for 4 hours. Add 2 milliliters of 30% hydrogen peroxide again for the third time, and continue to illuminate for 8 hours. After the reaction, the catalyst was separated by a magnet, and the COD of the waste water was measured (results are shown in Table 1).

[0033] See Table 3 for the experimental results of adding hydrogen peroxide in batches

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Abstract

The invention relates to a Fenton-reaction-based improved industrial organic wastewater treatment method which comprises the following steps: adding a magnetic ferrite nano material into industrial organic wastewater according to the proportion of 0.02-0.5 g / L, wherein the size of the magnetic ferrite nano material is 10-20nm; adding H2O2 at one time or in batches, wherein the H2O2 accounts for 1-10 vol% of the industrial organic wastewater; and reacting under ultraviolet irradiation for 2-24 hours; and carrying out magnetic separation to recover the magnetic ferrite nano material. The wastewater treatment method provided by the invention is especially suitable for treating high-COD (chemical oxygen demand) wastewater (with the COD content of greater than 100000 mg / L). By using the nano ferroferric oxide as the catalyst and performing the steps of batch addition of H2O2 and the like, the degradation rate can exceed 75%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an improved industrial organic wastewater treatment method based on the Fenton reaction. Background technique [0002] Water is the basic condition for human survival. China is a country with a shortage of water resources and frequent water disasters. The per capita water consumption is only 2,500 cubic meters, which is about 1 / 4 of the world's per capita water volume. It has been listed by the United Nations as one of the 13 water-poor countries. In recent years, with the rapid development of the national economy, the quality of China's water resources has continued to decline, and the water environment has continued to deteriorate. Water shortages and accidents caused by pollution have continued to occur, causing adverse social impacts and great economic losses. Seriously It threatens the sustainable development of social economy and even the survival of human bei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/32
Inventor 徐三善英瑜张健民户献雷
Owner GUANGZHOU TINCI MATERIALS TECH
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